Ventilation refers to the
A. gas exchange between the blood and the tissues.
B. respiration at the cellular level.
C. movement of air into and out of the lungs.
D. transportation of oxygen and carbon dioxide in the blood.
E. gas exchange between the air in the lungs and the blood.
Answer: C
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The disease osteomalacia causes calcium loss from the skeleton, which would result in bones that are
A) more resistant to compression. B) stronger and heavier. C) stronger and contain more spongy bone. D) weaker and more flexible. E) weaker and more brittle.
Which term describes blood clotting?
A. Coagulation B. Vascular spasm C. Platelet plug formation D. None of these answers are correct.
The posterior pituitary secretes ________
A) adrenocorticotropic hormone (ACTH) B) growth hormone (GH) C) oxytocin (OT) D) prolactin (PRL) E) thyroid hormone (TH)
Why is the contraction strength of smooth muscle relatively independent of its resting length?
A) It is regulated by a length-tension relationship. B) It does not have intercalated discs. C) It does not have sarcomeres. D) It gets nearly all of its Ca2+ from the extracellular fluid. E) It is involuntary muscle.